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C $Header: /usr/local/gcmpack/MITgcm/model/src/external_forcing_surf.F,v 1.18 2004/03/03 05:17:44 dimitri Exp $ |
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C $Name: $ |
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|
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#include "PACKAGES_CONFIG.h" |
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#include "CPP_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: EXTERNAL_FORCING_SURF |
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C !INTERFACE: |
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SUBROUTINE EXTERNAL_FORCING_SURF( |
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I bi, bj, iMin, iMax, jMin, jMax, |
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I myTime, myIter, myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE EXTERNAL_FORCING_SURF |
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C | o Determines forcing terms based on external fields |
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C | relaxation terms etc. |
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C *==========================================================* |
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C \ev |
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|
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C !USES: |
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IMPLICIT NONE |
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C === Global variables === |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "FFIELDS.h" |
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#include "DYNVARS.h" |
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#include "GRID.h" |
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#include "SURFACE.h" |
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#ifdef ALLOW_SEAICE |
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#include "SEAICE.h" |
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#endif /* ALLOW_SEAICE */ |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C === Routine arguments === |
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C myTime - Current time in simulation |
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C myIter - Current iteration number in simulation |
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C myThid :: Thread no. that called this routine. |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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INTEGER bi,bj |
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INTEGER iMin, iMax |
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INTEGER jMin, jMax |
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|
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C !LOCAL VARIABLES: |
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C === Local variables === |
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INTEGER i,j |
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C number of surface interface layer |
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INTEGER kSurface |
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CEOP |
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|
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if ( buoyancyRelation .eq. 'OCEANICP' ) then |
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kSurface = Nr |
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else |
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kSurface = 1 |
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endif |
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|
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C-- Surface Fluxes : |
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|
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DO j = jMin, jMax |
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DO i = iMin, iMax |
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|
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c Zonal wind stress fu: |
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surfaceTendencyU(i,j,bi,bj) = |
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& fu(i,j,bi,bj)*horiVertRatio*recip_rhoConst |
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& *recip_drF(kSurface)*recip_hFacW(i,j,kSurface,bi,bj) |
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c Meridional wind stress fv: |
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surfaceTendencyV(i,j,bi,bj) = |
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& fv(i,j,bi,bj)*horiVertRatio*recip_rhoConst |
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& *recip_drF(kSurface)*recip_hFacS(i,j,kSurface,bi,bj) |
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c Net heat flux Qnet: |
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surfaceTendencyT(i,j,bi,bj) = |
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& -Qnet(i,j,bi,bj)*recip_Cp*horiVertRatio*recip_rhoConst |
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& *recip_drF(kSurface)*recip_hFacC(i,j,kSurface,bi,bj) |
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C Net Salt Flux : |
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surfaceTendencyS(i,j,bi,bj) = |
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& -saltFlux(i,j,bi,bj)*horiVertRatio*recip_rhoConst |
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& *recip_drF(kSurface)*recip_hFacC(i,j,kSurface,bi,bj) |
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|
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#ifdef ALLOW_PASSIVE_TRACER |
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c *** define the tracer surface tendency here *** |
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#endif /* ALLOW_PASSIVE_TRACER */ |
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|
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ENDDO |
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ENDDO |
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|
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C-- Surface restoring term : |
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|
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IF ( doThetaClimRelax .OR. doSaltClimRelax ) THEN |
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DO j = jMin, jMax |
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DO i = iMin, iMax |
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#ifdef ALLOW_SEAICE |
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C Don't restore under sea-ice |
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C Heat Flux (restoring term) : |
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surfaceTendencyT(i,j,bi,bj) = surfaceTendencyT(i,j,bi,bj) |
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& -lambdaThetaClimRelax * (1-AREA(i,j,1,bi,bj)) |
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& *(theta(i,j,kSurface,bi,bj)-SST(i,j,bi,bj)) |
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C Salt Flux (restoring term) : |
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surfaceTendencyS(i,j,bi,bj) = surfaceTendencyS(i,j,bi,bj) |
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& -lambdaSaltClimRelax * (1-AREA(i,j,1,bi,bj)) |
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& *(salt(i,j,kSurface,bi,bj)-SSS(i,j,bi,bj)) |
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#else /* ifndef ALLOW_SEAICE */ |
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C Heat Flux (restoring term) : |
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IF ( abs(yC(i,j,bi,bj)).LE.latBandClimRelax ) THEN |
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surfaceTendencyT(i,j,bi,bj) = surfaceTendencyT(i,j,bi,bj) |
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& -lambdaThetaClimRelax |
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& *(theta(i,j,kSurface,bi,bj)-SST(i,j,bi,bj)) |
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C Salt Flux (restoring term) : |
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surfaceTendencyS(i,j,bi,bj) = surfaceTendencyS(i,j,bi,bj) |
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& -lambdaSaltClimRelax |
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& *(salt(i,j,kSurface,bi,bj)-SSS(i,j,bi,bj)) |
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ENDIF |
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#endif /* ALLOW_SEAICE */ |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C-- Fresh-water flux |
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|
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#ifdef NONLIN_FRSURF |
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IF ( (nonlinFreeSurf.GT.0 .OR. buoyancyRelation.EQ.'OCEANICP') |
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& .AND. useRealFreshWaterFlux ) THEN |
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|
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c- NonLin_FrSurf and RealFreshWaterFlux : PmEpR effectively changes |
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c the water column height ; temp., salt, (tracer) flux associated |
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c with this input/output of water is added here to the surface tendency. |
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c |
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c NB: PmEpR lag 1 time step behind EmPmR ( PmEpR_n = - EmPmR_n-1 ) to stay |
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c consitent with volume change (=d/dt etaN). |
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|
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IF (temp_EvPrRn.NE.UNSET_RL) THEN |
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DO j = jMin, jMax |
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DO i = iMin, iMax |
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surfaceTendencyT(i,j,bi,bj) = surfaceTendencyT(i,j,bi,bj) |
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& + PmEpR(i,j,bi,bj) |
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& *( temp_EvPrRn - theta(i,j,kSurface,bi,bj) ) |
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& *recip_drF(kSurface)*recip_hFacC(i,j,kSurface,bi,bj) |
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& *convertEmP2rUnit |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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IF (salt_EvPrRn.NE.UNSET_RL) THEN |
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DO j = jMin, jMax |
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DO i = iMin, iMax |
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surfaceTendencyS(i,j,bi,bj) = surfaceTendencyS(i,j,bi,bj) |
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& + PmEpR(i,j,bi,bj) |
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& *( salt_EvPrRn - salt(i,j,kSurface,bi,bj) ) |
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& *recip_drF(kSurface)*recip_hFacC(i,j,kSurface,bi,bj) |
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& *convertEmP2rUnit |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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ELSE |
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#else /* NONLIN_FRSURF */ |
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IF (.TRUE.) THEN |
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#endif /* NONLIN_FRSURF */ |
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|
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c- EmPmR does not really affect the water column height (for tracer budget) |
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c and is converted to a salt tendency. |
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|
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IF (convertFW2Salt .EQ. -1.) THEN |
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c- converts EmPmR to salinity tendency using surface local salinity |
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DO j = jMin, jMax |
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DO i = iMin, iMax |
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surfaceTendencyS(i,j,bi,bj) = surfaceTendencyS(i,j,bi,bj) |
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& + EmPmR(i,j,bi,bj)*salt(i,j,kSurface,bi,bj) |
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& *recip_drF(kSurface)*recip_hFacC(i,j,kSurface,bi,bj) |
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& *convertEmP2rUnit |
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ENDDO |
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ENDDO |
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ELSE |
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c- converts EmPmR to virtual salt flux using uniform salinity (default=35) |
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DO j = jMin, jMax |
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DO i = iMin, iMax |
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surfaceTendencyS(i,j,bi,bj) = surfaceTendencyS(i,j,bi,bj) |
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& + EmPmR(i,j,bi,bj)*convertFW2Salt |
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& *recip_drF(kSurface)*recip_hFacC(i,j,kSurface,bi,bj) |
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& *convertEmP2rUnit |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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ENDIF |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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#ifdef ALLOW_PTRACERS |
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IF ( usePTRACERS ) THEN |
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CALL PTRACERS_FORCING_SURF( |
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I bi, bj, iMin, iMax, jMin, jMax, |
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I myTime,myIter,myThid ) |
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ENDIF |
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#endif /* ALLOW_PTRACERS */ |
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|
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#ifdef ATMOSPHERIC_LOADING |
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|
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C-- Atmospheric surface Pressure loading : |
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|
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IF (buoyancyRelation .eq. 'OCEANIC' ) THEN |
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DO j = jMin, jMax |
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DO i = iMin, iMax |
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phi0surf(i,j,bi,bj) = pload(i,j,bi,bj)*recip_rhoConst |
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ENDDO |
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ENDDO |
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ELSEIF ( buoyancyRelation .eq. 'OCEANICP' ) THEN |
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C-- This is a hack used to read phi0surf from a file (ploadFile) |
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C instead of computing it from bathymetry & density ref. profile. |
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C The true atmospheric P-loading is not yet implemented for P-coord |
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C (requires time varying dP(Nr) like dP(k-bottom) with NonLin FS). |
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DO j = jMin, jMax |
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DO i = iMin, iMax |
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phi0surf(i,j,bi,bj) = pload(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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#endif /* ATMOSPHERIC_LOADING */ |
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|
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#ifdef ALLOW_TIMEAVE |
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IF ( taveFreq .NE. 0. _d 0 ) THEN |
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CALL TIMEAVE_SURF_FLUX( bi, bj, myTime, myIter, myThid) |
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ENDIF |
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#endif /* ALLOW_TIMEAVE */ |
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|
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RETURN |
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END |
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